thanks for the answer. I run sid but the aforementioned package does not include r8723bs, as i saw after i had downloaded it. Finally i found it at git but when I run 'modprobe r8723bs' I get a 'fatal error:no module found' message.

It would help to post a link to exactly what you downloaded from Github. Usually you have to build a module using the downloaded files and directions are often included in a README file and/or on the Github page.

Edit - found it from reddit link - https://github.com/hadess/rtl8723bsTo install, you need to build the driver module with make/makeinstall (you can search how to do that).The README file also mentioned the driver was merged to kernel 4.12 so just install a later kernel from backports should work. You would need firmware-realtek from backports as well.

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sunrat wrote:It would help to post a link to exactly what you downloaded from Github. Usually you have to build a module using the downloaded files and directions are often included in a README file and/or on the Github page.

Edit - found it from reddit link - https://github.com/hadess/rtl8723bsTo install, you need to build the driver module with make/makeinstall (you can search how to do that).The README file also mentioned the driver was merged to kernel 4.12 so just install a later kernel from backports should work. You would need firmware-realtek from backports as well.

thank you for the answer. The problem is that I did all these things and still have no success. I run kernel 4.14., (i run buster/sid) additionally i downloaded the driver, I did build it with make/makeinstall and when i modprobe it i did get a 'FATAL error, module not in lib/modules etc.'. so I had to download the .ko file from git , now i don't get this FATAL error etc, but Still no internal wireless (temporarily i use a usb dongle).the lshw and lspci | wireless don't show any hing , so perhaps is a hardware problem. I will send it to the service to find out...